From: mcr <mcr>
Date: Mon, 5 Apr 2004 00:15:50 +0000 (+0000)
Subject: 	print-esp has been "NDO"-ized.
X-Git-Tag: tcpdump-3.9.1~401
X-Git-Url: https://git.tcpdump.org/tcpdump/commitdiff_plain/6bb10ee1e5d9beca128f30b75003052a853a87eb

	print-esp has been "NDO"-ized.
	replace error() and warning() with ndo-ized version.
	moved snaplen/snapend to ndo structure.
---

diff --git a/interface.h b/interface.h
index ca3e69b5..5905a691 100644
--- a/interface.h
+++ b/interface.h
@@ -18,7 +18,7 @@
  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * @(#) $Header: /tcpdump/master/tcpdump/interface.h,v 1.226 2004-03-30 14:42:40 mcr Exp $ (LBL)
+ * @(#) $Header: /tcpdump/master/tcpdump/interface.h,v 1.227 2004-04-05 00:15:50 mcr Exp $ (LBL)
  */
 
 #ifndef tcpdump_interface_h
@@ -108,10 +108,6 @@ extern char *program_name;	/* used to generate self-identifying messages */
 
 extern int32_t thiszone;	/* seconds offset from gmt to local time */
 
-extern int snaplen;
-/* global pointer to end of current packet (during printing) */
-extern const u_char *snapend;
-
 /*
  * True if  "l" bytes of "var" were captured.
  *
@@ -257,7 +253,6 @@ extern void timed_print(const u_char *);
 extern void udp_print(const u_char *, u_int, const u_char *, int);
 extern void wb_print(const void *, u_int);
 extern int ah_print(register const u_char *);
-extern int esp_print(register const u_char *, register const u_char *, int *, int *);
 extern void isakmp_print(const u_char *, u_int, const u_char *);
 extern int ipcomp_print(register const u_char *, int *);
 extern void rx_print(register const u_char *, int, int, int, u_char *);
@@ -331,8 +326,10 @@ netdissect_options *gndo;
 #define Cflag gndo->ndo_Cflag 
 #define Aflag gndo->ndo_Aflag 
 #define packettype gndo->ndo_packettype
-#define espsecret  gndo->ndo_espsecret
 #define tcpmd5secret gndo->ndo_tcpmd5secret
 #define Wflag gndo->ndo_Wflag
 #define WflagChars gndo->ndo_WflagChars
 #define Cflag_count gndo->ndo_Cflag_count
+#define snaplen     gndo->ndo_snaplen
+#define snapend     gndo->ndo_snapend
+
diff --git a/netdissect.h b/netdissect.h
index 7533cfad..e0363b53 100644
--- a/netdissect.h
+++ b/netdissect.h
@@ -21,7 +21,7 @@
  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * @(#) $Header: /tcpdump/master/tcpdump/netdissect.h,v 1.3 2004-04-02 06:52:06 guy Exp $ (LBL)
+ * @(#) $Header: /tcpdump/master/tcpdump/netdissect.h,v 1.4 2004-04-05 00:15:50 mcr Exp $ (LBL)
  */
 
 #ifndef netdissect_h
@@ -104,6 +104,9 @@ struct netdissect_options {
   const char *ndo_dltname;
 
   char *ndo_espsecret;
+  struct sa_list *ndo_sa_list_head;  /* used by print-esp.c */
+  struct sa_list *ndo_sa_default;
+
   char *ndo_tcpmd5secret;     	/* TCP-MD5 secret key */
 
   struct esp_algorithm *ndo_espsecret_xform;   /* cache of decoded  */
@@ -133,6 +136,10 @@ struct netdissect_options {
 
   int  (*ndo_printf)(netdissect_options *,
 		     const char *fmt, ...);
+  void (*ndo_error)(netdissect_options *,
+		    const char *fmt, ...);
+  void (*ndo_warning)(netdissect_options *,
+		      const char *fmt, ...);
 };
 
 #define PT_VAT		1	/* Visual Audio Tool */
@@ -204,11 +211,6 @@ extern const char *tok2str(const struct tok *, const char *, int);
 extern void wrapup(int);
 
 #if 0
-extern void error(netdissect_options *, const char *, ...)
-     __attribute__((noreturn, format (printf, 2, 3)));
-extern void warning(netdissect_options *, const char *, ...)
-     __attribute__ ((format (printf, 2, 3)));
-
 extern char *read_infile(netdissect_options *, char *);
 extern char *copy_argv(netdissect_options *, char **);
 #endif
@@ -230,6 +232,9 @@ extern const char *dnnum_string(netdissect_options *, u_short);
 
 
 extern void eap_print(netdissect_options *,const u_char *, u_int);    
+extern int esp_print(netdissect_options *,
+		     register const u_char *bp, register const u_char *bp2,
+		     int *nhdr, int *padlen);
 
 #if 0
 extern void ascii_print_with_offset(netdissect_options *, const u_char *,
@@ -356,9 +361,6 @@ extern void udp_print(netdissect_options *,const u_char *, u_int,
 extern void wb_print(netdissect_options *,const void *, u_int);
 extern int ah_print(netdissect_options *,register const u_char *,
 		    register const u_char *);
-extern int esp_print(netdissect_options *,
-		     register const u_char *bp, register const u_char *bp2,
-		     int *nhdr, int *padlen);
 extern void esp_print_decodesecret(netdissect_options *ndo);
 extern void isakmp_print(netdissect_options *,const u_char *,
 			 u_int, const u_char *);
diff --git a/print-esp.c b/print-esp.c
index 519bfc35..96e97c87 100644
--- a/print-esp.c
+++ b/print-esp.c
@@ -23,7 +23,7 @@
 
 #ifndef lint
 static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-esp.c,v 1.49 2004-03-25 03:31:25 mcr Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-esp.c,v 1.50 2004-04-05 00:15:51 mcr Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -54,7 +54,7 @@ static const char rcsid[] _U_ =
 extern char *strsep(char **stringp, const char *delim); /* Missing/strsep.c */
 #endif
 
-#include "interface.h"
+#include "netdissect.h"
 #include "addrtoname.h"
 #include "extract.h"
 
@@ -83,10 +83,8 @@ struct sa_list {
 	int		secretlen;
 };
 
-static struct sa_list *sa_list_head = NULL;
-static struct sa_list *sa_default = NULL;
-
-static void esp_print_addsa(struct sa_list *sa, int sa_def)
+static void esp_print_addsa(netdissect_options *ndo,
+			    struct sa_list *sa, int sa_def)
 {
 	/* copy the "sa" */
 
@@ -94,19 +92,19 @@ static void esp_print_addsa(struct sa_list *sa, int sa_def)
 
 	nsa = (struct sa_list *)malloc(sizeof(struct sa_list));
 	if (nsa == NULL)
-		error("ran out of memory to allocate sa structure");
+		(*ndo->ndo_error)(ndo, "ran out of memory to allocate sa structure");
 
 	*nsa = *sa;
 
 	if (sa_def)
-		sa_default = nsa;
+		ndo->ndo_sa_default = nsa;
 
-	nsa->next = sa_list_head;
-	sa_list_head = nsa;
+	nsa->next = ndo->ndo_sa_list_head;
+	ndo->ndo_sa_list_head = nsa;
 }
 
 
-static int hexdigit(char hex)
+static int hexdigit(netdissect_options *ndo, char hex)
 {
 	if (hex >= '0' && hex <= '9')
 		return (hex - '0');
@@ -115,16 +113,16 @@ static int hexdigit(char hex)
 	else if (hex >= 'a' && hex <= 'f')
 		return (hex - 'a' + 10);
 	else {
-		printf("invalid hex digit %c in espsecret\n", hex);
+		(*ndo->ndo_error)(ndo, "invalid hex digit %c in espsecret\n", hex);
 		return 0;
 	}
 }
 
-static int hex2byte(char *hexstring)
+static int hex2byte(netdissect_options *ndo, char *hexstring)
 {
 	int byte;
 
-	byte = (hexdigit(hexstring[0]) << 4) + hexdigit(hexstring[1]);
+	byte = (hexdigit(ndo, hexstring[0]) << 4) + hexdigit(ndo, hexstring[1]);
 	return byte;
 }
 
@@ -135,7 +133,7 @@ static int hex2byte(char *hexstring)
  * causes us to go read from this file instead.
  *
  */
-static void esp_print_decode_onesecret(char *line)
+static void esp_print_decode_onesecret(netdissect_options *ndo, char *line)
 {
 	struct sa_list sa1;
 	int sa_def;
@@ -177,7 +175,7 @@ static void esp_print_decode_onesecret(char *line)
 			if (fileline[0] == '#') continue;
 			if (fileline[0] == '\0') continue;
 
-			esp_print_decode_onesecret(fileline);
+			esp_print_decode_onesecret(ndo, fileline);
 		}
 		fclose(secretfile);
 
@@ -196,7 +194,7 @@ static void esp_print_decode_onesecret(char *line)
 
 		spino = strtoul(spistr, &foo, 0);
 		if (spistr == foo || !spikey) {
-			printf("print_esp: failed to decode spi# %s\n", foo);
+			(*ndo->ndo_warning)(ndo, "print_esp: failed to decode spi# %s\n", foo);
 			return;
 		}
 
@@ -218,7 +216,7 @@ static void esp_print_decode_onesecret(char *line)
 #endif
 			sin->sin_family = AF_INET;
 		} else {
-			printf("print_esp: can not decode IP# %s\n", spikey);
+			(*ndo->ndo_warning)(ndo, "print_esp: can not decode IP# %s\n", spikey);
 			return;
 		}
 	}
@@ -229,7 +227,6 @@ static void esp_print_decode_onesecret(char *line)
 		int len;
 		size_t i;
 		const EVP_CIPHER *evp;
-		int ivlen = 8;
 		int authlen = 0;
 
 		/* skip any blank spaces */
@@ -238,7 +235,7 @@ static void esp_print_decode_onesecret(char *line)
 
 		colon = strchr(decode, ':');
 		if (colon == NULL) {
-			printf("failed to decode espsecret: %s\n", decode);
+			(*ndo->ndo_warning)(ndo, "failed to decode espsecret: %s\n", decode);
 			return;
 		}
 		*colon = '\0';
@@ -258,7 +255,7 @@ static void esp_print_decode_onesecret(char *line)
 		}
 		evp = EVP_get_cipherbyname(decode);
 		if (!evp) {
-			printf("failed to find cipher algo %s\n", decode);
+			(*ndo->ndo_warning)(ndo, "failed to find cipher algo %s\n", decode);
 			sa1.evp = NULL;
 			sa1.authlen = 0;
 			sa1.ivlen = 0;
@@ -267,7 +264,7 @@ static void esp_print_decode_onesecret(char *line)
 
 		sa1.evp = evp;
 		sa1.authlen = authlen;
-		sa1.ivlen = ivlen;
+		sa1.ivlen = EVP_CIPHER_iv_length(evp);
 
 		colon++;
 		if (colon[0] == '0' && colon[1] == 'x') {
@@ -276,13 +273,13 @@ static void esp_print_decode_onesecret(char *line)
 			len = strlen(colon) / 2;
 
 			if (len > 256) {
-				printf("secret is too big: %d\n", len);
+				(*ndo->ndo_warning)(ndo, "secret is too big: %d\n", len);
 				return;
 			}
 
 			i = 0;
 			while (colon[0] != '\0' && colon[1]!='\0') {
-				espsecret_key[i] = hex2byte(colon);
+				espsecret_key[i] = hex2byte(ndo, colon);
 				colon += 2;
 				i++;
 			}
@@ -302,28 +299,28 @@ static void esp_print_decode_onesecret(char *line)
 		}
 	}
 
-	esp_print_addsa(&sa1, sa_def);
+	esp_print_addsa(ndo, &sa1, sa_def);
 }
 
-static void esp_print_decodesecret(void)
+static void esp_print_decodesecret(netdissect_options *ndo)
 {
 	char *line;
 	char *p;
 
-	p = espsecret;
+	p = ndo->ndo_espsecret;
 
-	while (espsecret && espsecret[0] != '\0') {
+	while (ndo->ndo_espsecret && ndo->ndo_espsecret[0] != '\0') {
 		/* pick out the first line or first thing until a comma */
-		if ((line = strsep(&espsecret, "\n,")) == NULL) {
-			line = espsecret;
-			espsecret = NULL;
+		if ((line = strsep(&ndo->ndo_espsecret, "\n,")) == NULL) {
+			line = ndo->ndo_espsecret;
+			ndo->ndo_espsecret = NULL;
 		}
 
-		esp_print_decode_onesecret(line);
+		esp_print_decode_onesecret(ndo, line);
 	}
 }
 
-static void esp_init(void)
+static void esp_init(netdissect_options *ndo _U_)
 {
 
 	OpenSSL_add_all_algorithms();
@@ -332,7 +329,8 @@ static void esp_init(void)
 #endif
 
 int
-esp_print(const u_char *bp, const u_char *bp2
+esp_print(netdissect_options *ndo,
+	  const u_char *bp, const u_char *bp2
 #ifndef HAVE_LIBCRYPTO
 	_U_
 #endif
@@ -375,7 +373,7 @@ esp_print(const u_char *bp, const u_char *bp2
 	advance = 0;
 
 	if (!initialized) {
-		esp_init();
+		esp_init(ndo);
 		initialized = 1;
 	}
 #endif
@@ -386,28 +384,27 @@ esp_print(const u_char *bp, const u_char *bp2
 #endif
 
 	/* 'ep' points to the end of available data. */
-	ep = snapend;
+	ep = ndo->ndo_snapend;
 
 	if ((u_char *)(esp + 1) >= ep) {
 		fputs("[|ESP]", stdout);
 		goto fail;
 	}
-	printf("ESP(spi=0x%08x", EXTRACT_32BITS(&esp->esp_spi));
-	printf(",seq=0x%x", EXTRACT_32BITS(&esp->esp_seq));
-	printf(")");
+	(*ndo->ndo_printf)(ndo, "ESP(spi=0x%08x", EXTRACT_32BITS(&esp->esp_spi));
+	(*ndo->ndo_printf)(ndo, ",seq=0x%x)", EXTRACT_32BITS(&esp->esp_seq));
 
 #ifndef HAVE_LIBCRYPTO
 	goto fail;
 #else
 	/* initiailize SAs */
-	if (sa_list_head == NULL) {
-		if (!espsecret)
+	if (ndo->ndo_sa_list_head == NULL) {
+		if (!ndo->ndo_espsecret)
 			goto fail;
 
-		esp_print_decodesecret();
+		esp_print_decodesecret(ndo);
 	}
 
-	if (sa_list_head == NULL)
+	if (ndo->ndo_sa_list_head == NULL)
 		goto fail;
 
 	ip = (struct ip *)bp2;
@@ -422,7 +419,7 @@ esp_print(const u_char *bp, const u_char *bp2
 		len = sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen);
 
 		/* see if we can find the SA, and if so, decode it */
-		for (sa = sa_list_head; sa != NULL; sa = sa->next) {
+		for (sa = ndo->ndo_sa_list_head; sa != NULL; sa = sa->next) {
 			struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&sa->daddr;
 			if (sa->spi == ntohl(esp->esp_spi) &&
 			    sin6->sin6_family == AF_INET6 &&
@@ -440,7 +437,7 @@ esp_print(const u_char *bp, const u_char *bp2
 		len = EXTRACT_16BITS(&ip->ip_len);
 
 		/* see if we can find the SA, and if so, decode it */
-		for (sa = sa_list_head; sa != NULL; sa = sa->next) {
+		for (sa = ndo->ndo_sa_list_head; sa != NULL; sa = sa->next) {
 			struct sockaddr_in *sin = (struct sockaddr_in *)&sa->daddr;
 			if (sa->spi == ntohl(esp->esp_spi) &&
 			    sin->sin_family == AF_INET &&
@@ -457,7 +454,7 @@ esp_print(const u_char *bp, const u_char *bp2
 	 * an unspecified one.
 	 */
 	if (sa == NULL)
-		sa = sa_default;
+		sa = ndo->ndo_sa_default;
 	
 	/* if not found fail */
 	if (sa == NULL)
@@ -479,7 +476,7 @@ esp_print(const u_char *bp, const u_char *bp2
 	if (sa->evp) {
 		memset(&ctx, 0, sizeof(ctx));
 		if (EVP_CipherInit(&ctx, sa->evp, secret, NULL, 0) < 0)
-			printf("espkey init failed");
+			(*ndo->ndo_warning)(ndo, "espkey init failed");
 
 		blocksz = EVP_CIPHER_CTX_block_size(&ctx);
 
@@ -501,10 +498,17 @@ esp_print(const u_char *bp, const u_char *bp2
 	if (nhdr)
 		*nhdr = *(ep - 1);
 
-	printf(": ");
+	(ndo->ndo_printf)(ndo, ": ");
 	return advance;
 #endif
 
 fail:
 	return -1;
 }
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */
diff --git a/print-ip.c b/print-ip.c
index 97ce83a5..e0e9d2db 100644
--- a/print-ip.c
+++ b/print-ip.c
@@ -21,7 +21,7 @@
 
 #ifndef lint
 static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-ip.c,v 1.135 2004-03-24 09:00:08 guy Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-ip.c,v 1.136 2004-04-05 00:15:51 mcr Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -505,7 +505,7 @@ again:
 		case IPPROTO_ESP:
 		    {
 			int enh, padlen;
-			advance = esp_print(cp, (const u_char *)ip, &enh, &padlen);
+			advance = esp_print(gndo, cp, (const u_char *)ip, &enh, &padlen);
 			if (advance <= 0)
 				break;
 			cp += advance;
diff --git a/print-ip6.c b/print-ip6.c
index 87364717..3dc188e5 100644
--- a/print-ip6.c
+++ b/print-ip6.c
@@ -21,7 +21,7 @@
 
 #ifndef lint
 static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.40 2003-11-24 20:30:52 guy Exp $";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.41 2004-04-05 00:15:51 mcr Exp $";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -149,7 +149,7 @@ ip6_print(register const u_char *bp, register u_int length)
 		case IPPROTO_ESP:
 		    {
 			int enh, padlen;
-			advance = esp_print(cp, (const u_char *)ip6, &enh, &padlen);
+			advance = esp_print(gndo, cp, (const u_char *)ip6, &enh, &padlen);
 			nh = enh & 0xff;
 			len -= padlen;
 			break;
diff --git a/tcpdump.c b/tcpdump.c
index 2fe89cd4..a93699af 100644
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -30,7 +30,7 @@ static const char copyright[] _U_ =
     "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\
 The Regents of the University of California.  All rights reserved.\n";
 static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/tcpdump.c,v 1.239 2004-03-30 14:42:40 mcr Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/tcpdump.c,v 1.240 2004-04-05 00:15:52 mcr Exp $ (LBL)";
 #endif
 
 /*
@@ -107,6 +107,8 @@ static void print_packet(u_char *, const struct pcap_pkthdr *, const u_char *);
 static void dump_packet_and_trunc(u_char *, const struct pcap_pkthdr *, const u_char *);
 static void dump_packet(u_char *, const struct pcap_pkthdr *, const u_char *);
 static void droproot(const char *, const char *);
+static void ndo_error(netdissect_options *ndo, const char *fmt, ...);
+static void ndo_warning(netdissect_options *ndo, const char *fmt, ...);
 
 #ifdef SIGINFO
 RETSIGTYPE requestinfo(int);
@@ -123,9 +125,6 @@ RETSIGTYPE requestinfo(int);
 static void info(int);
 static u_int packets_captured;
 
-/* Length of saved portion of packet. */
-int snaplen = DEFAULT_SNAPLEN;
-
 typedef u_int (*if_printer)(const struct pcap_pkthdr *, const u_char *);
 
 struct printer {
@@ -418,6 +417,9 @@ main(int argc, char **argv)
 	gndo->ndo_tflag=1;
 	gndo->ndo_dlt=-1;
 	gndo->ndo_printf=tcpdump_printf;
+	gndo->ndo_error=ndo_error;
+	gndo->ndo_warning=ndo_warning;
+	gndo->ndo_snaplen = DEFAULT_SNAPLEN;
   
 	cnt = -1;
 	device = NULL;
@@ -503,7 +505,7 @@ main(int argc, char **argv)
 #ifndef HAVE_LIBCRYPTO
 			warning("crypto code not compiled in");
 #endif
-			espsecret = optarg;
+			gndo->ndo_espsecret = optarg;
 			break;
 
 		case 'f':
@@ -1301,3 +1303,42 @@ usage(void)
 "\t\t[ expression ]\n");
 	exit(1);
 }
+
+
+
+/* VARARGS */
+void
+ndo_error(netdissect_options *ndo _U_, const char *fmt, ...)
+{
+	va_list ap;
+
+	(void)fprintf(stderr, "%s: ", program_name);
+	va_start(ap, fmt);
+	(void)vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	if (*fmt) {
+		fmt += strlen(fmt);
+		if (fmt[-1] != '\n')
+			(void)fputc('\n', stderr);
+	}
+	exit(1);
+	/* NOTREACHED */
+}
+
+/* VARARGS */
+void
+ndo_warning(netdissect_options *ndo _U_, const char *fmt, ...)
+{
+	va_list ap;
+
+	(void)fprintf(stderr, "%s: WARNING: ", program_name);
+	va_start(ap, fmt);
+	(void)vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	if (*fmt) {
+		fmt += strlen(fmt);
+		if (fmt[-1] != '\n')
+			(void)fputc('\n', stderr);
+	}
+}
+